# -*- coding: utf-8 -*-

from loader import *
import warnings

def refreshdyn():
    import sys
    from EditorialModel.model import Model
    from leapi.lefactory import LeFactory
    from EditorialModel.backend.json_backend import EmBackendJson
    from DataSource.MySQL.leapidatasource import LeDataSourceSQL
    OUTPUT = Settings.dynamic_code_file
    EMJSON = Settings.em_file
    # Load editorial model
    em = Model(EmBackendJson(EMJSON))
    # Generate dynamic code
    fact = LeFactory(OUTPUT)
    # Create the python file
    fact.create_pyfile(em, LeDataSourceSQL, {})

def db_init():
    from EditorialModel.backend.json_backend import EmBackendJson
    from EditorialModel.model import Model
    mh = getattr(migrationhandler,Settings.mh_classname)()
    em = Model(EmBackendJson(Settings.em_file))
    em.migrate_handler(mh)

def em_graph(output_file = None, image_format = None):
    from EditorialModel.model import Model
    from EditorialModel.backend.json_backend import EmBackendJson
    from EditorialModel.backend.graphviz import EmBackendGraphviz
    import subprocess
    
    if image_format is None:
        if hasattr(Settings, 'em_graph_format'):
            image_format = Settings.em_graph_format
        else:
            image_format = 'png'
    if output_file is None:
        if hasattr(Settings, 'em_graph_output'):
            output_file = Settings.em_graph_output
        else:
            output_file = '/tmp/em_%s_graph.dot'
    image_format = image_format.lower()
    try:
        output_file = output_file%Settings.sitename
    except TypeError:
        warnings.warn("Bad filename for em_graph output. The filename should be in the form '/foo/bar/file_%s_name.png")
        pass

    dot_file = output_file+".dot"
    
    graphviz_bckend = EmBackendGraphviz(dot_file)
    edmod = Model(EmBackendJson(Settings.em_file))
    graphviz_bckend.save(edmod)
    dot_cmd = [
        "dot",
        "-T%s"%image_format,
        dot_file
    ]
    with open(output_file, "w+") as outfp:
        subprocess.check_call(dot_cmd, stdout=outfp)
    os.unlink(dot_file)
    print("Output image written in file : '%s'" % output_file)